Brake-beam.



' No. 63|,428. Patented Aug. 22, |899. J, MAKENZ-IE. BRAKE BEAM.

(Application led Occ, B, 1898. (No Model.)

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UNITED STATES PATENT OEEICE.

JOHN MACKENZIE, OF CLEVELAND, OHIO.

BRAKE-BEAM.

SPECIFICATION forming part of Letters Patent No. 631,428, dated August 22, 1899. Application filed October 8,1898- Serial No. 692,982. (No model.)

To LZZ whom, t may concern:

Be it known that I, J oHN MACKENZIE, a ctizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have inventeda certain new and useful"`Irnprovement in Brake-Beams, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

The object of the invention is to provide a novel form of brake-beam of which the chief advantages are due to the fact that to assemble and secure the parts thereof in position no bolts or rivets are used between its ends and no heating of parts is necessary.

The brake-beam embodyingthe invention is cheap, simple, and strong, and all of the members are subjected to a proper and uni form strain.

The invention is shown in the accompanying drawings and hereinafter described, and definitely pointed out in the claims.

In the drawings, Figure l is a bottom view of the complete beam, some of the parts being broken away to better sho7 the construction. Fig. 2 is a transverse sectional view in the plane indicated by line 2 2 of Fig. 1, and Fig. 3 is a sectional view in the plane 'indicated by line 3 3.

Referring to the parts by letters, A represents the compression member ofthe beam,

` which is substantially T-shaped in the transverse section, this form being that which is not only best adapted to resist the torsional strain to which it will be subjected in use, but

is also best adapted to be combined in the manner described with the other parts of the beam. Vhen the beam is used in the o rdinary manner on a railway-car, the webct occupies a substantially vertical position, While the two iiangesv ct a2 extend horizontally in opposite directions from the upper edge of the web.

The tension member B, which is preferably a rectangular bar, is bent intothe desired form substantially as. shown, itsv ends being bent back so as to be adapted to extend around the ends of the Web a and to lie in contact with both sides thereof. The thickness of this tension member is preferably a trifle less than the widthV of the flanges a a2.

The brake-heads C embrace the ends of the member A and the bent ends of the member B and are preferably shrunk onto these parts in the position shown, whereby the two members are connected. The bolts c are, however, preferably employed to hold the heads firmly in place, said bolts passing through kthe web of the member Abut not through the bent ends of the member C.

The strut or king-post D is notched at what, for convenience in description, Iwill term the front end, and the highest part of the tension member lies in and fits this notch d. On the rear end of this strut is formed a sleeve d', which embraces the compression member. Internally this sleeve' is of such shape that it can have substantially no up-.and-down movement, but can be moved a considerable dis tance forward and backward. It is provided with an inwardly-extended lug d2, which engages With a notch as in the liange a2, this lug and notch being for the purpose of preventing any movement of the sleeve longitudinally of the compression member.

E represents a'key which when the vparts have been assembled in the desired relation to each other is driven in between the web a and the front part of the sleeve d. This key is beveled on its front surface, and the adjacent part of the sleeve d' is correspondingly beveled, whereby the driving in of this key forces the strut forward su ficiently to bring about the proper tension and impose a uni- 'a tension member whose ends extend around the ends of the web of the compression mem ber and lie on each side of said web in the space bounded on two sides by the web and a flange, and a collar which embraces the compression member near its end and embraces the tension member on each side of the web where it contacts therewith, in combination With a strut held between.v theftensionand compression member, substantially as described.

2. In a brake-beam, a compression member which is T-shaped in cross-section by IOO reason of a longitudinal web and longitudinal i member and with the edge of the web and flanges extending therefrom, and a tension l with two outer sides of each of the tension member the ends of which are rectangular' in i member ends, combined with a strut between cross-section and extend around the ends of i. said two members, substantially as described. the web of the compression member and lie i In testimony whereof I hereunto ax my against each side thereof, and a collar having l signature in the presence of two Witnesses. a substantially rectangular opening and surrounding said compression member and the JOHN MACKENZIP" tension member near the end of the beam, i said collar contacting with the edges and; outer faces of the flanges of the compression l Witnesses:

PHILIP E. KNoWL'roN, E. L. THURsToN. 

